1 files changed, 0 insertions, 80 deletions
diff --git a/desiredata/doc/3.audio.examples/buttercoef3.pd b/desiredata/doc/3.audio.examples/buttercoef3.pd
deleted file mode 100644
index 6d15d6af..00000000
--- a/desiredata/doc/3.audio.examples/buttercoef3.pd
+++ /dev/null
@@ -1,80 +0,0 @@
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-#X obj 63 51 inlet;
-#X floatatom 522 134 5 0 0 0 - - -;
-#X obj 101 153 t f f;
-#X msg 101 108 0.667;
-#X msg 82 283 0;
-#X obj 517 270 loadbang;
-#X obj 528 298 inlet;
-#X obj 517 322 f;
-#X obj 517 346 expr 1 - 2*$f1;
-#X obj 63 79 t b b b f;
-#X obj 205 228 * -1;
-#X obj 163 228 t f f;
-#X obj 63 391 f;
-#X obj 30 463 outlet;
-#X text 515 237 1 to normalize at Nyquist;
-#X text 59 30 characteristic frequency \, 0(DC) to 1(Nyquist);
-#X obj 283 470 outlet;
-#X obj 439 472 outlet;
-#X text 439 494 imag2a;
-#X text 283 492 real1;
-#X text 374 494 real2;
-#X obj 500 473 outlet;
-#X text 500 495 imag2b;
-#X obj 373 470 outlet;
-#X text 27 485 normalizer1;
-#X obj 173 470 outlet;
-#X text 170 492 normalizer2;
-#X obj 156 436 expr (($f2-$f1)*($f2-$f1)+$f3*$f3);
-#X obj 63 412 t f f;
-#X obj 101 176 expr (1 - $f2*$f2) / (1 + $f2*$f2 + 2*$f2*cos($f1))
-;
-#X obj 163 205 expr 2*$f2*sin($f1) / (1 + $f2*$f2 + 2*$f2*cos($f1))
-;
-#X obj 82 307 expr (1 - $f2*$f2) / (1 + $f2*$f2 + 2*$f2*cos($f1));
-#X obj 522 89 clip 0 1;
-#X obj 522 111 expr tan($f1*1.57);
-#X obj 101 131 expr $f1*1.5708;
-#X text 515 251 0 to normalize at DC;
-#X text 119 4 3-pole (or zero) Butterworth filter coefficient calculator
-;
-#X text 145 109 "theta" in units of pi/2;
-#X text 211 138 conjugate pair of pole/zero locations:;
-#X text 197 155 real part: (1-r*r)/(1+r*r-2rcos(th));
-#X text 245 226 imaginary part: 2rsin(th)/(...);
-#X text 270 282 real-valued one \, theta=0;
-#X obj 30 439 expr abs($f1-$f2);
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